Referenced Items are not available for this document.
1. The decision to use all spar-member construction for a 230-kv wood-pole H-frame line was based on 16 years of satisfactory service from 115-and 138-kv lines with spar arms. 2. The use of 12 insulators for suspension strings results in a co-ordinated design with liberal margin for switching surges and a low lightning outage probability. 3. All spar-member construction permits application of hardware which facilitates structure assembly with a minimum of field drilling. 4. Tests on full-size structures show they have a safety factor of more than 4½ times maximum design transverse loading. 5. Tests confirm earlier findings of others that crushed-rock backfill for poles holes is an effective way to increase resistance to uplift on poles. 6. Highly mechanized line-construction operations result in time and cost savings.
Published in:
Power Apparatus and Systems, Part III. Transactions of the American Institute of Electrical Engineers
(Volume:76
,
Issue:
3
)
Date of Publication: April 1957
- Page(s):
- 377 - 382
- ISSN :
- 0018-9510
- Digital Object Identifier :
- 10.1109/AIEEPAS.1957.4499570
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 07 May 2008
- Issue Date :
- April 1957
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